A man with a wife and family, who never had a job, who depends on his wife to support the family and his own evil habits, takes up with another woman. But rather than abandon his wife and family, he stays on, pretending to be a husband and father so that he can continue to take his wife's money and use it to support his mistress.
There is normally nothing lower than a man who abandons his wife and family, but a man who robs from his wife and children to support his mistress is "worse than an infidel".
This is Apuron.
His mistress is the Neocatechumenal Way. His wife and children is the Catholic flock he vowed to shepherd when he was consecrated bishop. He has never had a job. He has always lived off his wife. And he stays on as bishop so that he can rob from that wife and support his mistress and their many bastard children.